The distributor unit is located underneath the vehicle floor to the left hand side behind the auxiliary delivery pump.
Depending on the engine, 2 different distributor units are fitted.
• 5-fold distributor unit with throttle (M57)
• H-piece with throttle (M67)
Task
The 5-fold distributor unit with throttle has the task of making fuel from the return line available if the pressure before the in-line EFP is too low.
Here, the return line with the supply side are short circuited.
A part of the return fuel can be mixed with the delivery quantity for the HPP.
